Question

我尝试过使用下面的代码，但它似乎无法正常工作：

Public Class TransparentPanel
      Inherits Panel
      Protected Overrides ReadOnly Property CreateParams() As CreateParams
      Get
        Dim cp As CreateParams = MyBase.CreateParams
        cp.ExStyle = cp.ExStyle Or &H20
        ' WS_EX_TRANSPARENT
        Return cp
      End Get
End Property

Protected Overrides Sub OnPaint(e As PaintEventArgs)
    e.Graphics.FillRectangle(New SolidBrush(Me.BackColor), Me.ClientRectangle)
End Sub
End Class

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这是我的代码：

Imports Telerik.WinControls

Public Class Form1


  Private Sub Button1_Click(sender As System.Object, e As System.EventArgs)    Handles Button1.Click

      '' RadPanel1.BackColor = Color.Red
       RadPanel1.Visible = True
    RadPanel1.AutoSize = True
    RadPanel1.RootElement.StretchVertically = True
    RadPanel1.RootElement.StretchHorizontally = True
    RadPanel1.Location = New Point(2, 2)
    RadPanel1.Size = New Size(200, 1)
    RadPanel1.Text = "I am RadPanel"

    Dim setting As New AnimatedPropertySetting()
    setting.[Property] = RadElement.BoundsProperty
    setting.StartValue = New Rectangle(0, 0, 200, 1)
    setting.EndValue = New Rectangle(0, 0, 280, 250)
    setting.Interval = 30
    setting.NumFrames = 35
    setting.ApplyValue(RadPanel1.RootElement)
End Sub


End Class

Answer 1

在WinForms中使用透明度时，您应该记住，控件只能与其父控件相比才是透明的。因此，如果Form是其父级，您将能够观察与Form相比的RadPanel透明度。但是，如果你有两个RadPanels，两个孩子都是Form，而不是孩子，你就不会在彼此重叠的地方看到透明度。

以下是有关此事的一些文章：

Answer 2

您是否尝试过使用Alpha属性设置颜色？从我所看到的，其他人已经取得了成功。

RadPanel1.BackColor = Color.FromArgb(100, 88, 44, 55);

How can I set the opacity or transparency of a Panel in WinForms?

我试图制作一个radpanel（使用telerik）transluscent的d背景颜色

2 个答案: